Walker 16616 Catalytic Converter with Integrated Exhaust Manifold

EPA-Compliant Manifold Converter for Frontier

Walker EPA 16616 is a direct-fit catalytic converter with integrated exhaust manifold for select Nissan Frontier and Suzuki Equator applications. It is built for OBDII vehicles and uses a ceramic substrate with stainless steel construction for front exhaust placement.

Key Features

• Direct-fit catalytic converter with integrated exhaust manifold
• EPA-compliant design for federal emissions applications
• Stainless steel converter body with ceramic substrate material
• Front converter position with 5-bolt welded flange inlet and 4-bolt welded flange outlet
• Oxygen sensor location: pre-catalyst
• Includes installer card, warranty card, hardware, and gaskets
• Cross-reference: Dorman OE Solutions 674-603

Product Details

Walker EPA 16616 is part of the Walker Ultra EPA-Compliant Manifold Converter line, which is built for import and domestic OBDII vehicles that require an EPA emissions-compliant replacement. This part number is engineered as a direct-fit front manifold converter with an oval inlet, round outlet port shape, and integrated exhaust manifold layout to match the original exhaust configuration on covered vehicles. It is a practical replacement for Nissan Frontier exhaust repair work and also applies to Suzuki Equator models listed below. The part number 16616 is also referenced in aftermarket catalogs alongside AP Exhaust 641407 and Eastern Catalytic 40882 for the same application.

Vehicle Fitment

• Fits 2019 Nissan Frontier, N/A
• Fits 2005-2018 Nissan Frontier, N/A; Fits Fed. & Calif. Emission Models; not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult aftermarket converter regulations in your state for details. Exhaust gasket is recommended; additional part needed to complete installation: 31576; Ultra Type; EPA
• Fits 2009-2012 Suzuki Equator, N/A; Fits Fed. & Calif. Emission Models; not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult aftermarket converter regulations in your state for details. Exhaust gasket is recommended; additional part needed to complete installation: 31576; Ultra Type; EPA

Installation Notes

Confirm the vehicle’s emissions family and state requirements before installation. This converter uses a 5-bolt welded flange inlet and 4-bolt welded flange outlet, and the fitment notes call for exhaust gasket use and an additional part, 31576, to complete installation on listed applications. Verify pre-catalyst oxygen sensor placement and match the original exhaust manifold layout before assembly.

Quality Assurance

Walker EPA 16616 is designed to meet EPA emissions requirements for covered applications and is built with a stainless steel body and ceramic substrate for replacement use on select Nissan Frontier and Suzuki Equator vehicles. Walker’s Ultra EPA-Compliant Manifold Converter line is positioned for compliant replacement on 1996-and-newer OBDII vehicles.